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I J. B. DAVIS. QUANTITY STOP.FOR DISPENSING PUMPS. JR-o APPL|CATION FILED AUG} 7, l'9l5- I I Patented Aug. 8,1916.

2 SHEETS-SHEET I INVENTOR. Jafizzflflww. BY

ATTORNEYS.

W I TNESS I I .l. B. DAVIS.

QUANTITY STOP FOR DISPENSING PUMPS.

2 SHEETSSHEET 2- I Patented Aug. 8,1916.

APPLICATION FILED AUG-7,1915.

W I TNES I gQM K I I A TTORNE YS.

JOHN B. DAVIS, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNCR TO GILBERT & BARKER MANUFACTURING COMPANY, OF WEST SPRINGFIELD, MASSACHUSETTS, A CORPO- RATION' OF MASSACHUSETTS.

QUANTITY-STOP FOR. DISPENSING-PUMPS.

Specification of Letters Patent.

Patented Aug. 8, 1016.

Application filed August 7, 1915. Serial No. 44,190.

To all whom it may concern:

Be it known that I, JOHN B. DAVIS, a citizen of the United States of America, residing in the city of Springfield, county of Hampden, and State of Massachusetts, have invented certain new and useful Improvements in Quantity-Stops for Dispensing- Pumps, of which the following is a specification.

This invention relates to an improved con struction by which quantity stops are provided for use in measuring pumps and particularly in self-measuring gasolene pumps. Such-a pump, called a dispensing pump, is inspected in the large cities and sealed in order to protect the customer against short measure.

The general purpose of this invention is to provide an improvement of my patented structure shown in my ;Patent No. 1,000,965, granted August 15, 1911. The structure shown in that patent has been found most satisfactory in use, but it is'expensive to manufacture. By the present improvement, I provide structure which will give the same satisfactory results in use but, by its particular or novel arrangement, will cost less to manufacture and which generally simplifies the structure necessary for the results desired.

The following detail description taken in connection with the accompanying drawings will illustrate my preferred mode of applying the invention. The scope of the invention will be defined in the appended claim.

Referring to the drawings Figure 1 is a general view of a dispensing pump with the improved quantity stops in place; Fig. 2 is a detail plan view partly in section of a quantity stop in place to engage the stop on the rack bar; Fig. 3 is a side elevation of the same; Fig. 4 is a detail view partly in section of one of the stops taken on line 1- 1 of Fig. 2; Fig. 5 is a sectional view of a bearing block for the stop; Fig. 6 is a seetional view taken on line 6-6 of Fig. 3; Fig. 7 is a plan view of the bearing block of Fig. 5; and Fig. 8 is a sectional view taken on line 88 of Fig. 1.

A represents the lower casing of a dispensing pump of well-known construction. 7 represents a portion of the inclosing doors for the upper part of the pump. This pump operates, as well understood in the art, by

means of a rack 1 connected to the pump piston and reciprocated by means of a set of gears turnedby the handle 3. The outlet for the pump is indicated generally by 1.

Arranged adjacent to the reciprocable rack bar 1 and parallel thereto is a rod 5 as shown in Fig. 1, in this case, pinned permanently in position. 011 this rod 5 are arranged the quantity stops 6 at spaced dis tances apart. Generally, a dispensing apparatus of this character is designed to deliver one gallon at one reciprocation of the rack 1. In order to measure smaller quantities than a gallon, there is provided on the rack a fixed stop pin 2 adapted to engage any one of the quantity stops which may be placed in position for this purpose. Thus the quantity stops cooperating with the fixed stop 2 are operable to make an accurate delivery from the pump of, say, one pint, a quart, or one-half gallon.

The general operation of the pump and the way in which the quantity stops are used in the art are fully described in my prior patent above referred to, and, therefore, the specific construction of the stop involved in this invention will not be described. WVith reference to a single stop, as indicated in several views (Figs. 2 to 8, inclusive), each stop comprises a main casting 6 having a smaller portion 11 extending laterally from one end thereof. This stop 6 has an opening adapted to permit the stop to slide freely over the rod 5. Referring to Fig. 6, the main casting 6 is positioned at a fixed point on the rod 5 approximately in the position desired for the given stop to cooperate with the fixed stop 2 for a given measurement. A horizontal slot 15 is provided in the main casting 6 which connects with the opening for the rod 5. Arranged in this slot is a bearing block 16 (see Figs. 5 and 7). This bearing block 16 is adapted to receive a set screw 17, as shown in Fig. 6. When the bearing block 16 is placed in slot 15 by screw 17 it fixes the casting 6 on the rod 5 so that it can not move longitudinally of the rod 5. The casting 6 can, however, swing horizontally with a bearing on the block 1.6 approximately 180. In the lateral projection 11 of the casting 6, an opening is provided to receive the stud 13 of the adjustable stop member 12. The member 12 is preferably circular and arranged eccentrically to'the stud 13.' The latter has a close bearing in its opening in casting 6 and is provided with a circumferential slot 14: adapted to receive the lower end of a set screw 10. By this construction, the stop 12 may be turned with the stud13 so that its lower edge 30 may be adjusted very accurately in a vertical direction. When the member 12 has been properly adjusted, the set screw 10 is turned to bind it in place against further turning. From Fig. 4, it

, will be seen that the set screw 10, when in binding position, has its upper end considerably below the top of the opening provided therefor in the casting 6. In the recess thus' provided, a block 9, provided with a transverse opening to receive the sealing wire 18, is provided. By this means, the sealing wire 18 maybe passed through the opening of the block 9, brought around under the casting 6, and sealed by the lead 19. With the parts thus in position, as indicated in Fig. 8, it will be seen that it is impossible to further adjust the portion 12. Again referring to Fig. 1, when all the stops have been properly placed on the rod 5 and the portion 12 of each stop is accurately adjusted and sealed in position to engage the stop 2 on the rack bar 1, whereby each stop will accurately insure its proper measurement, the pump is in condition to be used as a selfmeasuring dispensing pump. With all the stops in place as described, itwill be seen Copies of this patent may be obtained forv five cents each, by addressing the that any one of them may be turned in position on its bearing block 16 to limit the stroke of the piston, or all may be turned out of position in order to permit the full stroke of the piston.

The particular advantage of the measuring stops described consists in the extremely accurate measurement or adjustments which it is possible to make when the pump is assembled and the simplicity of the structure which enables accurate measurements to be made and which enables the stops to be I sealed to insure full measure to the customer.

hat I claim is:

In a device of the type specified, the combination of a reciprocable member, a smooth rod parallel with said member, an indicating stop having a hub constructed to slide on said rod, a horizontal slot in said hub, means passing through said slot and into the rod to bind the hub against a complete rotascrew in place.

JOHN B. DAVIS.

Commissioner of Patents,

Washington, I). C. 

